I also have the Shen Hao HZX45-IIA. For me I have to have a fresnel under the ground glass with wide angle lenses. The Shen Hao ground glass holder has a recessed channel that the Shen Hao fresnel fits under,
which does not change the distance from lens to ground glass so the focal plane is not changed. If you remove the two black clips holding the ground glass in place you will see that the fresnel is actually slightly smaller than the ground glass. The Shen Hao fresnel does a good job of redirecting the light towards you when you are under the dark cloth, lighting all the way to the corners of the ground glass. When you focus with a loupe you will see the grain of the fresnel, but that has never bothered me. My f8 lenses are nice and bright on the glass even indoors or in dark conditions.
For full disclosure I did change my ground glass, I was unhappy with the standard Shen Hao glass. I purchased a
Steve Hopf borosilicate ground glass, which I love. It did brighten up the glass a bit, but I purchased it more for the fine focusing grain and a simple 1/2 inch grid without all of the roll format lines. Hope this helps.
-Nathan
Bookmarks